1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bc438d0c5c7e4bd1b3e7ea26b2bb7cae51d162d75a5eca9f5dd06984a23629c. Chain 2 (Bitcoin): anchored in block 953423 (2026-06-12T21:20:00Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/abc7fa53-da33-46c6-b614-b460362d7fe3.json and https://artists.proofprofile.net/proofs/artist/abc7fa53-da33-46c6-b614-b460362d7fe3.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x14b21cae0f08d7a72c90541306215967156479c3625b9d9db25661165d123e21. Chain 2 (Bitcoin): anchored in block 953520 (2026-06-13T13:32:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USUYG1474718.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41155cb6532ce7130e3d3cb329fa43baae6a8b45e08a031ec27507e4267b4a7. Chain 2 (Bitcoin): anchored in block 957122 (2026-07-08T03:39:04Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP52106772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xca40119772389200064eb3006ede44ee037b41ed2cca1d6d474b82d7f6181ccd. Chain 2 (Bitcoin): anchored in block 953536 (2026-06-13T17:25:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZK6F2168338.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7937d12dd6f86ad0e0b62cd5e8ae6bbcac1ac37482d9d2620fef7b014a4aae8b. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/US92U1903818.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcaced2918adb747117173818a50f816e0418a8b984c0cfedad2d0031c83ee3a5. Chain 2 (Bitcoin): anchored in block 956304 (2026-07-02T03:55:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2175391.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xde42a144ec9b1ad1c85823f1ce003e5997a330c02c454c84348f8b4bb1cd1e8b. Chain 2 (Bitcoin): anchored in block 954130 (2026-06-17T19:07:14Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QMJMT2003162.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc93744e4e8b7b032be94abe5ffe44784dc8dece026a69ac4cc7018640b1db5ce. Chain 2 (Bitcoin): anchored in block 953528 (2026-06-13T15:41:10Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/USA2P1828448.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x03b963eb860d40401a4b720590a20fa14da39fca4620039f54d5d147d20ac10e. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP52107847.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2bf6a73df53de587a929c394181af8f557f5614e274ed39c2824032c826edd62. Chain 2 (Bitcoin): anchored in block 957073 (2026-07-07T18:39:05Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2246959.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x19082e49a003cde4a68c50edb6840bc979f1eec6f6e614324dec4a9b73163ef4. Chain 2 (Bitcoin): anchored in block 956302 (2026-07-02T03:30:09Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP52107848.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xc42e4425298557018d95c58a164248842884cb4650036a9e47f047e07154eb9b. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2246960.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3697558141372139581755373bddc5993a9c5276a4d9258ad6f1e833b60e8687. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2246961.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe41155cb6532ce7130e3d3cb329fa43baae6a8b45e08a031ec27507e4267b4a7. Chain 2 (Bitcoin): anchored in block 956312 (2026-07-02T05:09:12Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZRP52106772.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb1177f0e375c8d4e2c11eebfcae1c514d8c63dac2b14bfc2eab6ac38bc95ad72. Chain 2 (Bitcoin): anchored in block 957118 (2026-07-08T03:20:19Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFYX2246963.